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path: root/dokka-runners/dokkatoo/buildSrc/src/main/kotlin/buildsrc/tasks/UpdateDokkatooExampleProjects.kt
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package buildsrc.tasks

import buildsrc.settings.DokkatooExampleProjectsSettings.DokkatooExampleProjectSpec
import javax.inject.Inject
import org.gradle.api.DefaultTask
import org.gradle.api.NamedDomainObjectContainer
import org.gradle.api.model.ObjectFactory
import org.gradle.api.tasks.CacheableTask
import org.gradle.api.tasks.Internal
import org.gradle.api.tasks.Nested
import org.gradle.api.tasks.TaskAction

/**
 * Utility for updating the `gradle.properties` of projects used in automated tests.
 */
@CacheableTask
abstract class UpdateDokkatooExampleProjects @Inject constructor(
  @get:Internal
  val objects: ObjectFactory
) : DefaultTask() {

  @get:Nested
  abstract val exampleProjects: NamedDomainObjectContainer<DokkatooExampleProjectSpec>

  private val taskPath: String = path // renamed for clarity

  @TaskAction
  fun update() {
    exampleProjects.forEach { exampleProject ->
      updateGradleProperties(exampleProject)
    }
  }

  private fun updateGradleProperties(exampleProject: DokkatooExampleProjectSpec) {

    val gradlePropertiesContent = exampleProject.gradlePropertiesContent.orNull?.sorted() ?: return

    val content = buildString {
      appendLine("# DO NOT EDIT - Generated by $taskPath")
      appendLine()

      gradlePropertiesContent.forEach {
        appendLine(it)
      }
    }

    exampleProject.gradlePropertiesFile.get().asFile.writeText(content)
  }
}